masautt

const lengthOfLongestSubstring = s => {
  let longest = 0;
  let start = 0;
  const seen = {};

  [...s].forEach((char, i) => {
    if (char in seen && start <= seen[char]) {
      longest = Math.max(i - start, longest);
      start = seen[char] + 1;
    }

masautt

// Using RegEx

String.prototype.replaceAll = function(search, replacement) {
    var target = this;
    return target.replace(new RegExp(search, 'g'), replacement);
};

// Split and Join (Functional Implementation)

String.prototype.replaceAll = function(search, replacement) {

masautt

let arr = [1, 2, 3, 4, 5];

// Remove from the front
arr.pop();

console.log(arr); // --> [2, 3, 4, 5];

// Remove from back
arr.unshift( );

masautt

// Through the console?
window.location.replace("https://google.com");

// Put it on a button?
document.getElementById("myBtn").addEventListener("click", () => {
  window.location.href = "https://google.com";
});

masautt

let str = "Masautt";
let subString = "sau";

console.log(str.includes(subString)); // true

masautt

<a href="https://google.com" target="_blank">GO TO GOOGLE.COM IN SEPARATE WINDOW</a>

masautt

let idLength = 6;
Math.random().toString(36).slice(idLength); // y80wde7

masautt

let arr = [
  { prop: "7" },
  { prop: "3" },
  { prop: "6" },
  { prop: "1" }
]

//Sort in ascending 
arr.sort(function(a, b) {
    return (a.prop - b.prop);

masautt

var arr = ["7", "2", "5", "9"];

// Sort in ascending order?
arr.sort(); // --> 2,5,7,9

// Descending order?
arr.reverse(); // --> 9,7,5,2

masautt

//ES 7+
Object.entries(obj).length === 0 && obj.constructor === Object

//ES 5+
Object.keys(obj).length === 0 && obj.constructor === Object

//ES 5-
function isEmpty(obj) {
  for(var prop in obj) {
    if(obj.hasOwnProperty(prop)) {